16809712 has 20 divisors (see below), whose sum is σ = 32907616. Its totient is φ = 8317440.

The previous prime is 16809679. The next prime is 16809739. The reversal of 16809712 is 21790861.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3864 + ... + 6967.

Almost surely, 2^16809712 is an apocalyptic number.

It is an amenable number.

16809712 is a deficient number, since it is larger than the sum of its proper divisors (16097904).

16809712 is a wasteful number, since it uses less digits than its factorization.

16809712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10936 (or 10930 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 16809712 is about 4099.9648778983. The cubic root of 16809712 is about 256.1651766048.

The spelling of 16809712 in words is "sixteen million, eight hundred nine thousand, seven hundred twelve".